초록 ▼

An integrated process for improved hydrocarbon recovery from a natural gas resource is disclosed. A methane-rich stream, an LPG stream and optionally a C5+ stream are isolated from a natural gas source in a first separation zone and desulfurized. The methane-rich stream is converted to syngas and s

An integrated process for improved hydrocarbon recovery from a natural gas resource is disclosed. A methane-rich stream, an LPG stream and optionally a C5+ stream are isolated from a natural gas source in a first separation zone and desulfurized. The methane-rich stream is converted to syngas and subjected to hydrocarbon synthesis, for example, Fischer-Tropsch synthesis. The products from the hydrocarbon synthesis typically include a C4- fraction, a C5-C20 fraction, and a C20+ wax fraction. These fractions are isolated in a second separation zone. The C4- fraction is recycled through the first separation zone to provide methane for conversion to synthesis gas and an additional LPG fraction. The C4- fraction can be treated, for example, with hydrotreating or hydroisomerization catalysts and conditions before or after the separation. The C5-C20 fraction and the C20+ wax and heavy fraction are subjected to additional process steps, for example, hydro treatment, hydroisomerization, and/or hydrocracking. The products are sent to a third separation zone, and yield an additional C4- fraction, as well as higher molecular weight products. The additional C4- fraction can also be sent to the first separation zone and treated in an analogous fashion to the C4- fraction from the hydrocarbon synthesis. Any sulfur-containing compounds resulting from the additional processing of the hydrocarbon synthesis products (i.e., hydroconversion reactions) can be treated along with the sulfur-containing compounds in the natural gas, eliminating the need for a second sulfur-treatment plant.

대표청구항 ▼

An integrated process for improved hydrocarbon recovery from a natural gas resource is disclosed. A methane-rich stream, an LPG stream and optionally a C5+ stream are isolated from a natural gas source in a first separation zone and desulfurized. The methane-rich stream is converted to syngas and s

An integrated process for improved hydrocarbon recovery from a natural gas resource is disclosed. A methane-rich stream, an LPG stream and optionally a C5+ stream are isolated from a natural gas source in a first separation zone and desulfurized. The methane-rich stream is converted to syngas and subjected to hydrocarbon synthesis, for example, Fischer-Tropsch synthesis. The products from the hydrocarbon synthesis typically include a C4- fraction, a C5-C20 fraction, and a C20+ wax fraction. These fractions are isolated in a second separation zone. The C4- fraction is recycled through the first separation zone to provide methane for conversion to synthesis gas and an additional LPG fraction. The C4- fraction can be treated, for example, with hydrotreating or hydroisomerization catalysts and conditions before or after the separation. The C5-C20 fraction and the C20+ wax and heavy fraction are subjected to additional process steps, for example, hydro treatment, hydroisomerization, and/or hydrocracking. The products are sent to a third separation zone, and yield an additional C4- fraction, as well as higher molecular weight products. The additional C4- fraction can also be sent to the first separation zone and treated in an analogous fashion to the C4- fraction from the hydrocarbon synthesis. Any sulfur-containing compounds resulting from the additional processing of the hydrocarbon synthesis products (i.e., hydroconversion reactions) can be treated along with the sulfur-containing compounds in the natural gas, eliminating the need for a second sulfur-treatment plant. d dispersant is a phosphated block poly(alkylsiloxane) poly(alkyleneether) alcohol. 5. The dispersant slurry of claim 1 wherein said dispersant is 2-25 wt % based on the weight of inorganic particulate. 6. The dispersant slurry of claim 1 wherein said inorganic particulate is about 35-70 wt % based on total weight of the dispersant slurry. 7. The dispersant slurry of claim 1 wherein said inorganic particulate has a mean particle size, based on volume distribution, of about one micron or less. 8. The slurry of claim 1 wherein the inorganic particulate is selected from the group consisting of titanium dioxide, zinc oxide, magnesium oxide, aluminum oxide, magnesium carbonate, calcium carbonate, barium carbonate, synthetic hydrotalcite, natural hydrotalcite, calcium sulfate, barium sulfate, and a physical mixture of huntite and hydromagnesite, and the liquid amide is selected from the group consisting of N-methylpyrrolidone, dimethyl acetamide, and dimethyl formamide. 9. The slurry of claim 8 comprising 35-70 wt % inorganic particulate, wherein the dispersant is phosphated block poly(methylsiloxane)-trimethylene-poly (alkyleneether) alcohol and is present to the extent of about 4-15 wt % based on inorganic particulate, and the inorganic particulate has a median particle size, based on volume distribution, no larger than about one micron.